TABLE OF CONTENTS
Ohaus Corporation www.ohaus.com
i
Valor
™
7000 Series Service Manual
Page No.
CHAPTER 1 GETTING STARTED
1.1
Introduction ..............................................................................................................1-1
1.2 Service Facilities ......................................................................................................1-1
1.3
Tools and Test Equipment Required ........................................................................1-1
1.4 Specifications ...........................................................................................................1-2
1.5
Scale Operation Valor 7000 .....................................................................................1-3
1.5.1 Overview of the Controls ...................................................................................1-3
1.5.2 Power On/Off ....................................................................................................1-4
1.5.3 Menu Setup ......................................................................................................1-5
1.5.4 Menu Navigation ...............................................................................................1-5
1.6
Legal For Trade .......................................................................................................1-6
1.7.1 Settings .............................................................................................................1-6
1.7.2 Verification ........................................................................................................1-6
1.7.3 Sealing ..............................................................................................................1-6
CHAPTER 2 TROUBLESHOOTING
2.1 Troubleshooting .......................................................................................................2-1
2.2 Diagnostic Guide ......................................................................................................2-1
2.2.1 Diagnosis ..........................................................................................................2-1
2.2.2 Checking Load Cells for Trouble .......................................................................2-2
2.2.3 Testing the Printed Circuit Board (PCB) ............................................................2-4
2.2.4 Diagnostic Guide...............................................................................................2-6
CHAPTER 3 MAINTENANCE PROCEDURES
3.1 Preventive Maintenance ...........................................................................................3-1
3.1.1 Preventive Maintenance Checklist ....................................................................3-1
3.2 Service Strategy .......................................................................................................3-1
3.3
Opening the Scale....................................................................................................3-1
3.2.1 Separating the Top and Bottom Housings .........................................................3-2
3.4 Removing/Replacing the Main Printed Circuit Board (PCB) .....................................3-3
3.5
Removing/Replacing the Load Cell ..........................................................................3-4
3.6
Setting the Overload Stops ......................................................................................3-5
3.7
Removing/Replacing the Rechargeable Battery .......................................................3-7
3.8
Replacing the Function Label ...................................................................................3-7
CHAPTER 4 TESTING
4.1. Testing .....................................................................................................................4-1
4.1.1 Test Masses Required ......................................................................................4-1
4.2
Operational Test ......................................................................................................4-1
4.3
Segment Display Test ..............................................................................................4-1
4.4. Performance Tests ...................................................................................................4-2
4.4.1 Precision Test ...................................................................................................4-2
4.4.2 Repeatability Test .............................................................................................4-3
4.4.3 Linearity Test ....................................................................................................4-5
4.4.4 Off-Center Load Test ........................................................................................4-5
4.4.5 Adjusting Off Center Load .................................................................................4-6
